Method of producing open mesh bags



July 12, 1938.

W. E. SACKNER ET AL METHOD OF PRODUCING OPEN MESH BAGS Original Filed001;. 21; 1956 INVENTOR. I VaaeE.60 c/mer BY J0/7/7 E. MM/flf ATTORNEYS.

Patented July 12, 1938 UNITED STATES PATENT OFFICE Wade E. Sackner andJohn E. Millett, Grand Rapids, Mich.

Original application October 21, 1886, Serial No.

Divided and this application March 18. 1937, Serial No. 181,626

1 Claim.

This invention relates to the manufacture of open mesh bags for producesuch as onions, potatoes or the like and particularly to such bags madefrom twisted paper cords or strands interwoven together. In making suchbags. it is essential to have suillcient strength to withstand strainsimposed by shipping and handling and it is likewise desirable to havelarge enough openings between meshes so that the produce in the 10 bagcan be viewed with ease. Such bags have been made of single strands ofinterwoven twisted paper cord, but in order to obtain the desiredstrength it is necessary to have the meshes closed up so as to interferewith the viewing of the prod- 1 not. Leno weave bags have been made. butsuch bags are not satisfactory because the spacing between the singlestrands cannot be wide enough while maintaining the desired strength. Inthe bags made from single strands woven as a mesh,

20 considerable difficulty is experienced in use because the strandstend to move along one another and become displaced.

This application is a division of our copending application which issuedas Patent No. 2,078,! 14,

.35 on April 27, 1937, for Open mesh bags.

The objects of this invention are:

First, to provide a method of producing a new and improved bag of thetype referred to in which the difficulties above mentioned are overcomeand in which a suillciently wide mesh may be had for viewing the producein the bag.

Second, to provide a method of producing such a bag in which the strandsof paper are so disposed as to provide relatively large meshes withoutsacrificing strength.

Third, to provide a method of producing such a bag in which the strandsare so arranged that the displacement or sliding thereof is effectivelyprevented.

Fourth, to provide a method for producing fabric for such'bags whichwill simply, inexpensively and efiectively produce a bag of the desiredtype.

Further objects and advantages pertaining to etails and economies ofconstruction and operation will definitely appear from the descriptionto follow. A preferred embodiment of our invention is illustrated in theaccompanying draw- 50 ing, in which:

Fig. i is a perspective view of a bag made in accordance with ourinvention.

Fig. 2.is a detailed view showing the arrangement of the warp and weftstrands in the fabric 55 of the bag.

Fig. 3 is a detail sectional view taken on line 8-4 of Fig. 2.

Fig. 4 is a detail sectional view taken on line 4-4 of Fig. 2. v

In the drawing, the bag I is of an open mesh type having the openings 2through which produce is to be viewed. The fabric of the bag is made upof a plurality of twisted paper strands. The paper employed is of suchweight that these strands or cords are about twenty-eight thousandths ofan inch in diameter and we have found that with such cord the bag can bemade inexpensively and of suflicient strength. The strands 3 arearranged as shown in Fig. 2. Warp strands 4 are disposed in pairs. Thepairs are spaced apart and the individual strands of each pair arespaced relatively close together. In a very satisfactory arrangement thepairs of strands are spaced apart about one-fourth of an inch and theindividual strands of each pair are spaced apart slightly less thanone-eighth of an inch.

In setting up a loom, the warp threads 4 are set up in pairs as shownand the individual strands of each pair are set up to fall in oppositesheds of the loom. The weft strands 5 in the material are arrangedsubstantially identically with the warp strands. That is to say, theyare in pairs, the pairs being spaced about one-fourth of an inch apartin a very satifactory bag and the individual strands of each pair beingspaced apart slightly less than one-eighth of an inch. The individualstrands of each pair are on different sheds of fabric as will be notedfrom reference to Fig. 2. p

In weaving the fabric, the weft strands 5 are woven into position andthe loom is operated to change the shed and a second weft strand iswoven in place. Both of the weft strands 6 of each pair are woven on asingle take-up pick of the loom. In other words, the loom picks twiceand then takes up or advances the warp ahead once, so that the take-uppulls the warp ahead only after every other pick of the loom.

It will be observed that in carrying out this method of weaving two weftstrands in a single take-up pick, the weft strands 5 will be relativelyclose together and that the changing of the shed with the two weftstrands close together tends to kink or deform the warp strands 4 as isshown at 6 in Fig. 3. The paper strand or cord, while not entirelyinelastic, is suiflciently moldable that the deformation due to theclose spacing of the individual strands of the pair leaves the kink ordeformation in the strand. Similarly, it will be noted by reference toFig. 4 that the weft strands are deformed by the operation of changingthe shed in weaving. This is extremely advantageous in that the kinkingof each strand at its place of crossing each other strand tends toprevent the cross strands sliding longitudinally on the other strands,so that the meshes remain open throughout the life of the bag. Thiscould not be accomplished with ordinary burlap, and it is essential thata paper cord which is not completely elastic be used. The resultantfabric which has the individual strands of ,each pair of warp strands indiflerent sheds and has the individual strands of each pair of weftstrands in opposite sheds may be made simply and easily on a standardloom and its has not been considered necessary to here illustrate theloom.

The finished material which has at the top, as shown at I, a series ofsubstantially solid weaving, is cut in suitable lengths and the edges ofthe pieces are stitched together as at I to Iorm the finished bag I.

amasaa Having thus described our invention. what we 0185511111 as newand desire secure by Letters Paten 5:

The method of producing paper mesh fabric for produce bags or the like,comprising disposing' warp strands of twisted paper cord for weaving inspaced apart pairs with the individual strands of each pair disposedrelatively close together and in opposite sheds, and weaving in twistedpaper cord weft strands a pair to each take-up pick with the individualstrands of each pair on opposite sheds of the warp, whereby the weftstrands are disposed in spaced apart pairs with the individual strandsrelatively close together and whereby each strand of weft or warp iskinked at its point oi crossing each other strand.

WADE E. SACKNER. JOHN E. MILLE'I'I'.

